Sand washing apparatus



Jan. 16, 1934. H. A. FRIBERG SAND WASHING APPARATUS Filed June 18, 1931 III in [I] HQ IIII INVENTOR da 7 BY fig Patented Jan. 16, 1934 UNITED STATs Pidiill i"? Application June 18, 1931.

4 Claims.

My invention relates to sand washing apparatus.

The object of my invention is to provide an improved device of this character which washes 5 sand more efiiciently than previous devices of the same sort, which is of sturdy construction, reliable in operation and which removes a maximum of water from the sand before discharge from the sand washing apparatus.

The nature of the invention will be readily understood from the following description taken in conjunction with the accompanyingdrawing showing a preferred form of sand washing apparatus embodying the invention.

In the drawing:

Fig. 1 is a side view partly in section of the sand washing apparatus; and

Fig. 2 is a sectional view taken on the line 2-2 of Fig. 1.

Mounted on a suitable base are two standards 11 and 12. These standards support bearings 13 and 14. Between standards 11 and 12 is a wash box 15 of generally rectangular form. The wash box may be made of sheet steel or of Wood and comprises a bottom 16, end walls 17 and 18 and side walls 19 and 20. The side walls 19 and 20 are preferably close to the standards 11 and 12 whereby the sand box is held in position.

A horizontal shaft 21 is rotatably journalled in bearings 13 and 14. Centrally mounted on shaft 21 to rotate therewith is a paddle wheel 22. The paddle wheel comprises spokes 23 extending radially outward. These spokes may be made of Wood. At the outer ends of the spokes 23 and secured thereto are axially extending paddles 24. These paddles have substantially parallel outer and inner edges 25 and 26 respectively. The sand receiving surfaces 26 extend axially and may be inclined somewhat to the radial as shown.

Secured to each spoke 23 is a spoke chute 27 having a triangular side member secured to the spoke and a bottom 28 inclined substantially to the horizontal. An outer flange 29 may also 45 be provided. One of the edges 30 of each spoke chute is spaced somewhat in a radial direction from the paddle on the same spoke in order to provide a drain space 31 therebetween. The sand receiving surface 26' of each paddle is in a plane above, that is, peripherally in advance of, the plane of the triangular side of the adjacent spoke chute so that, when the sand slides off the surface 26, it will pass into the spoke chute and not into the drain space 31. Hence, the paddles are spaced from the respective spoke chutes in both Serial No. 545,297

a radial and a peripheral direction. The bottoms 28 of the spoke chutes are all directed to the same side, namely, the right side as shown in Fig. 2.

An inlet chute 32 is provided at one side of the wash box and substantially under bearing 14. In the end wall 1? of the wash box is an overflow opening 33. Adjacent the opposite end wall is a curved scraper plate curved about the axis of rotation and of a radius slig 1y greater than the outer radii of the spokes and paddles whereby on rotation the paddles are close to scraper plate 34. A member 35 support the scraper plate 34.- above the top of the wash box.

An outlet chute 36 has an upper end 37 above bearing 13 and so arranged as to receive sand from the spoke chutes 2'? when the latter are rotated to the upper part of the apparatus. The outlet chute slopes obliquely downwardly and leads to a storage bin or bins for the sand. A sprocket wheel 38 is connected to shaft 21 and be rotated by a chain or the like.

In operation:

Sand and water are admitted through the inlet chute 32 to the wash box. The sand sinks to the bottom and the learn and foreign matter float off with the water through the overflow opening 33 to which a suitable chute may be connected. The paddle wheel is rotated in the direction of the arrow in Fig. 1 and the paddles pick up the sand as shown in Fig. l, carrying it against the scraper plate a": and upwardly to above the wash box. In passing from the horizontal upwardly to vertical position, water is drained from the sand and passes out through drain spaces 31. When the spokes approach vertical position the sand falls into the spoke chutes 27 and flows laterally to the outlet chute 36 and thence to the bin or bins.

The paddle wheel is centrally disposed on the shaft 21 and two side bearings are provided whereby a sturdy structure is obtained. The drain spaces 31 provide means for draining off the water so that the sand passing into the chute 36 is as free as possible of water.

The inlet chute 32 is disposed a substantial distance from the scraper plate 34 and the flow is in the opposite direction to the overflow opening 33 in order that the foreign matter may be readily separated from the sand and carried away from the paddles at the place where the paddles lift the sand out of the water.

While I have shown one apparatus embodying the invention, it will be understood that variallO tions of structure are possible within the scope of the invention.

What I claim is:

1. Sand washing apparatus comprising a wash box and a paddle wheel mounted on a horizontal axis and movable within said wash box, said paddle wheel comprising spokes, and chutes attached to said spokes and spaced from said paddles in both a radial and a peripheral direction, said chutes having triangular sides and radially inward bottoms disposed at an angle to the horizontal.

2. Sand washing apparatus comprising a Wash box, a horizontal shaft, means for supporting said shaft comprising a plurality of bearings, and a paddle wheel movable within said wash box and supported on said shaft centrally between said bearings, said paddle wheel comprising spokes, paddles attached to said spokes and spoke chutes attached to said spokes and spaced from said paddles, and an outlet chute having an upper end over one of said bearings and arranged to receive sand from said spoke chutes.

3. Sand washing apparatus comprising a wash box, a horizontal shaft, means for supporting said shaft comprising a plurality of bearings, and a paddle wheel movable within said wash box and supported on said shaft centrally between said bearings, said paddle wheel comprising spokes, paddles attached to said spokes and spoke chutes attached to said spokes and spaced from said paddles, said spoke chutes having triangular sides and radially inward bottoms disposed at an angle to the horizontal, and an outlet chute having an upper end over one of said bearings and arranaged to receive sand from said spoke chutes.

4. Sand washing apparatus comprising a base, standards mounted on said base, bearings mounted in said standards, a wash box between said standards, said bearings being symmetrically disposed relative to said wash box, a horizontal shaft rotatably journalled in said bearings, a paddle wheel mounted on said shaft centrally between said bearings comprising radial spokes, paddles mounted on said spokes and extending parallel to the axis of said paddle wheel, and spoke chutes mounted on said spokes having radially extending triangular sides and bottoms inclined about 45 to the horizontal, said chutes having the edges adjacent the paddles spaced somewhat therefrom to permit drainage of water between the paddles and the spoke chutes, a curved scraper plate in said wash box curved radially about the axis of rotation at a radial distance slightly greater than the outer edges of the paddles, means to supply water and sand to the wash box beneath said shaft, said wash box having an overflow opening in the end thereof opposite the scraper plate, an outlet chute having an upper end over one of said bearings and arranged to receive sand from said spoke chutes, and means to rotate said paddle.

HARRY ADOLPH FRIBERG. 

